US 11,706,809 B2
Random access channel and associated uplink data channel structure construction
Chunhai Yao, Beijing (CN); Haitong Sun, Cupertino, CA (US); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Fangli Xu, Beijing (CN); Haijing Hu, Beijing (CN); Hong He, San Jose, CA (US); Jie Cui, San Jose, CA (US); Oghenekome Oteri, San Diego, CA (US); Weidong Yang, San Diego, CA (US); Wei Zeng, San Diego, CA (US); Yang Tang, San Jose, CA (US); Yuchul Kim, San Jose, CA (US); Yuqin Chen, Beijing (CN); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 11, 2021, as Appl. No. 17/174,315.
Claims priority of application No. PCT/CN2020/074944 (WO), filed on Feb. 12, 2020.
Prior Publication US 2021/0251015 A1, Aug. 12, 2021
Int. Cl. H04W 74/08 (2009.01); H04W 76/27 (2018.01); H04W 72/21 (2023.01)
CPC H04W 74/0833 (2013.01) [H04W 72/21 (2023.01); H04W 76/27 (2018.02)] 17 Claims
OG exemplary drawing
 
1. A wireless device comprising:
one or more computer processors configured to cause the wireless device to:
generate a physical random access channel (PRACH) preamble mapped to a physical uplink shared channel (PUSCH) resource unit, the PRACH preamble associated with a preamble group indicating a configuration of the PUSCH, the preamble group having a size and a group index indicated by radio resource control (RRC) signaling received by the wireless device from a base station, wherein the group index identifies the preamble group from a plurality of preamble groups;
determine the size of the preamble group using at least one of a ceiling operation or a floor operation performed on a number of contention-based preambles and a number of preamble groups used for a two-step random access channel (RACH);
encode a message comprising the PRACH preamble and a payload carried by the PUSCH, the configuration of the PUSCH comprising parameters for decoding the message; and
transmit the message to the base station, wherein the base station decodes the message based on the parameters of the configuration of the PUSCH indicated by the preamble group.